@nestjs-cqrs-eventsourcing/core/src/eventstore/event.class.js

Event sourcing for nestjs CQRS

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.Event = void 0;
const debug_1 = __importDefault(require("debug"));
const lodash_1 = __importDefault(require("lodash"));
const debug = (0, debug_1.default)('eventstore:event');
class Event {
    constructor(eventStream, payload, eventMappings = {}) {
        this.eventMappings = {};
        if (!eventStream) {
            const errStreamMsg = 'eventstream not injected!';
            debug(errStreamMsg);
            throw new Error(errStreamMsg);
        }
        if (!payload) {
            const errEvtMsg = 'event not injected!';
            debug(errEvtMsg);
            throw new Error(errEvtMsg);
        }
        if (!eventStream.aggregateId) {
            const errAggIdMsg = 'eventstream.aggregateId not injected!';
            debug(errAggIdMsg);
            throw new Error(errAggIdMsg);
        }
        if (!lodash_1.default.isArray(eventStream.uncommittedEvents)) {
            const errAggIdMsg = 'eventstream.uncommittedEvents not injected!';
            debug(errAggIdMsg);
            throw new Error(errAggIdMsg);
        }
        this.eventMappings = eventMappings || {};
        this.id = String(eventStream.aggregateId);
        this.aggregateId = String(eventStream.aggregateId);
        this.aggregate = String(eventStream.aggregate);
        this.context = eventStream.context ? String(eventStream.context) : undefined;
        this.streamRevision = -1;
        this.commitId = '';
        this.commitSequence = -1;
        this.timestamp = undefined;
        this.payload = payload || null;
        this.position = undefined;
    }
    applyMappings() {
        if (!this.eventMappings) {
            throw new Error('No eventMappings defined');
        }
        const keys = lodash_1.default.keys(this.eventMappings);
        for (const key of keys) {
            const extraEventValue = this[key];
            if (extraEventValue !== undefined && extraEventValue !== null) {
                lodash_1.default.set(this.payload, this.eventMappings[key], extraEventValue);
            }
        }
    }
}
exports.Event = Event;